App for Autodesk® AutoCAD® makes it easy to create or draw a catenary curve as a polyline by specifying the start and end point and the length/immediate point/sag and optionally a diameter(width).

An app to batch change or fix file paths and names of external references in drawings. Supports Xrefs, Datalinks, Raster Images, PDFs, DWFs, and DGNs.

App for Autodesk® AutoCAD® makes it easy to create or draw a catenary curve as a polyline by specifying the start and end point and the length/immediate point/sag and optionally a diameter(width).

An app to batch change or fix file paths and names of external references in drawings. Supports Xrefs, Datalinks, Raster Images, PDFs, DWFs, and DGNs.

DWG Columns freeware shows the DWG and DXF version in Explorer columns or in file dialog boxes within Autodesk® AutoCAD® or other applications.

Allows changing layer color of selected multiple objects without entering layer manager.

Lisp allows continuing drawing Polyline, 2D polyline, 3D Polyline, MultiLine, or Line starting from the selected end.

Replaces the last profile entity with the exact same profile entity. This provides a method to remove the extended portion of a profile after the extension.

A command to label the station ahead and station behind a vertex on polyline relative to an alignment PI. This command is useful when Civil 3D only presents for the station and offset label.

Extracts all of the boundaries from surfaces in the drawing.

This will help in creating an Autodesk® Civil 3D® profile based on the vertices of the 3D polyline.

OCF検定に合格しているDWGとSXF形式（sfc/p21/SFZ/P2Z）への相互変換ツールです。 またAutodesk® Civil 3D®で出力したLandXMLに、日本独自の属性を付加し、「３次元設計データ交換標準（案）Ver.1.2」として出力します。

Attempts to improve a field survey in certain cases by creating a smoothed out version of an original 3d polyline

A road design productivity tool to quickly visualize horizontal sight distance lines along a polyline alignment.

Generates successive polyline approximations of lwpolyline/polyline3d objects to smooth out the original shape but keep the overall polyline trend.

Morphs one polyline into another by generating intermediate polylines at arbitrary stages of the process.

A basic recursive random tree generator in 2D and 3D.

A seven-parameter similarity transformation calculator in 3D space.

Create multiple surfaces from a selected Autodesk® Civil 3D® surface at precise elevations.

Arrange is a plug-in for Autodesk® AutoCAD® for arranging objects.

BOM Assigner & Exporter is an Autodesk® AutoCAD® tool which helps to get quick Bill of Materials in 2D architectural drawings.

Create shortcuts/bookmark to the xref files and set the properties of xref, so that later these xref's can be attached easily.

Quickly trace the boundary of selected objects. From selected objects(Line, Arc, Polyline), the app will trace and find out Closed Polyline in a second.

Inserting and Editing RasterImage is simpler than ever!